Rename REAMDE to README.md
[nit.git] / src / testing / testing_doc.nit
index ffac328..7d4afe6 100644 (file)
@@ -16,7 +16,7 @@
 module testing_doc
 
 import testing_base
-intrude import markdown
+intrude import docdown
 
 # Extractor, Executor and Reporter for the tests in a module
 class NitUnitExecutor
@@ -25,8 +25,8 @@ class NitUnitExecutor
        # The prefix of the generated Nit source-file
        var prefix: String
 
-       # The module to import
-       var mmodule: MModule
+       # The module to import, if any
+       var mmodule: nullable MModule
 
        # The XML node associated to the module
        var testsuite: HTMLTag
@@ -34,32 +34,31 @@ class NitUnitExecutor
        # All blocks of code from a same `ADoc`
        var blocks = new Array[Array[String]]
 
-       redef fun process_code(n: HTMLTag, text: String)
+       # All failures from a same `ADoc`
+       var failures = new Array[String]
+
+       redef fun process_code(n: HTMLTag, text: String, tag: nullable String)
        do
                # Skip non-blocks
                if n.tag != "pre" then return
 
+               # Skip strict non-nit
+               if tag != null and tag != "nit" and tag != "" then
+                       return
+               end
+
                # Try to parse it
                var ast = toolcontext.parse_something(text)
 
+               # Skip pure comments
+               if ast isa TComment then return
+
                # We want executable code
                if not (ast isa AModule or ast isa ABlockExpr or ast isa AExpr) then
-                       if ndoc != null and n.tag == "pre" and toolcontext.opt_warn.value > 1 then
-                               toolcontext.warning(ndoc.location, "invalid-block", "Warning: There is a block of code that is not valid Nit, thus not considered a nitunit")
-                               if ast isa AError then toolcontext.warning(ast.location, "syntax-error", ast.message)
-                               ndoc = null # To avoid multiple warning in the same node
-                       end
-                       return
-               end
-
-               # Search `assert` in the AST
-               var v = new SearchAssertVisitor
-               v.enter_visit(ast)
-               if not v.foundit then
-                       if ndoc != null and n.tag == "pre" and toolcontext.opt_warn.value > 1 then
-                               toolcontext.warning(ndoc.location, "invalid-block", "Warning: There is a block of Nit code without `assert`, thus not considered a nitunit")
-                               ndoc = null # To avoid multiple warning in the same node
-                       end
+                       var message = ""
+                       if ast isa AError then message = " At {ast.location}: {ast.message}."
+                       toolcontext.warning(mdoc.location, "invalid-block", "Error: there is a block of invalid Nit code, thus not considered a nitunit. To suppress this warning, enclose the block with a fence tagged `nitish` or `raw` (see `man nitdoc`).{message}")
+                       failures.add("{mdoc.location}: Invalid block of code.{message}")
                        return
                end
 
@@ -73,68 +72,167 @@ class NitUnitExecutor
                blocks.last.add(text)
        end
 
-       # The associated node to localize warnings
-       var ndoc: nullable ADoc = null
+       # The associated documentation object
+       var mdoc: nullable MDoc = null
 
        # used to generate distinct names
        var cpt = 0
 
        # The entry point for a new `ndoc` node
-       # Fill the prepated `tc` (testcase) XTM node
-       fun extract(ndoc: ADoc, tc: HTMLTag)
+       # Fill `docunits` with new discovered unit of tests.
+       #
+       # `tc` (testcase) is the pre-filled XML node
+       fun extract(mdoc: MDoc, tc: HTMLTag)
        do
                blocks.clear
+               failures.clear
+
+               self.mdoc = mdoc
 
-               self.ndoc = ndoc
+               work(mdoc)
 
-               work(ndoc.to_mdoc)
                toolcontext.check_errors
 
+               if not failures.is_empty then
+                       for msg in failures do
+                               var ne = new HTMLTag("failure")
+                               ne.attr("message", msg)
+                               tc.add ne
+                               toolcontext.modelbuilder.failed_entities += 1
+                       end
+                       if blocks.is_empty then testsuite.add(tc)
+               end
+
                if blocks.is_empty then return
 
-               for block in blocks do test_block(ndoc, tc, block)
+               for block in blocks do
+                       docunits.add new DocUnit(mdoc, tc, block.join(""))
+               end
        end
 
-       # Execute a block
-       fun test_block(ndoc: ADoc, tc: HTMLTag, block: Array[String])
+       # All extracted docunits
+       var docunits = new Array[DocUnit]
+
+       # Execute all the docunits
+       fun run_tests
        do
-               toolcontext.modelbuilder.unit_entities += 1
+               var simple_du = new Array[DocUnit]
+               for du in docunits do
+                       var ast = toolcontext.parse_something(du.block)
+                       if ast isa AExpr then
+                               simple_du.add du
+                       else
+                               test_single_docunit(du)
+                       end
+               end
 
-               cpt += 1
-               var file = "{prefix}{cpt}.nit"
+               test_simple_docunits(simple_du)
+       end
 
-               toolcontext.info("Execute doc-unit {tc.attrs["name"]} in {file}", 1)
+       # Executes multiples doc-units in a shared program.
+       # Used for docunits simple block of code (without modules, classes, functions etc.)
+       #
+       # In case of compilation error, the method fallbacks to `test_single_docunit` to
+       # * locate exactly the compilation problem in the problematic docunit.
+       # * permit the execution of the other docunits that may be correct.
+       fun test_simple_docunits(dus: Array[DocUnit])
+       do
+               if dus.is_empty then return
+
+               var file = "{prefix}-0.nit"
 
                var dir = file.dirname
                if dir != "" then dir.mkdir
                var f
-               f = new OFStream.open(file)
-               f.write("# GENERATED FILE\n")
-               f.write("# Example extracted from a documentation\n")
-               f.write("import {mmodule.name}\n")
-               f.write("\n")
-               for text in block do
-                       f.write(text)
+               f = create_unitfile(file)
+               var i = 0
+               for du in dus do
+
+                       i += 1
+                       f.write("fun run_{i} do\n")
+                       f.write("# {du.testcase.attrs["name"]}\n")
+                       f.write(du.block)
+                       f.write("end\n")
+               end
+               f.write("var a = args.first.to_i\n")
+               for j in [1..i] do
+                       f.write("if a == {j} then run_{j}\n")
                end
                f.close
 
                if toolcontext.opt_noact.value then return
 
-               var nit_dir = toolcontext.nit_dir
-               var nitg = nit_dir/"bin/nitg"
-               if not nitg.file_exists then
-                       toolcontext.error(null, "Cannot find nitg. Set envvar NIT_DIR.")
+               var res = compile_unitfile(file)
+
+               if res != 0 then
+                       # Compilation error.
+                       # Fall-back to individual modes:
+                       for du in dus do
+                               test_single_docunit(du)
+                       end
+                       return
+               end
+
+               i = 0
+               for du in dus do
+                       var tc = du.testcase
+                       toolcontext.modelbuilder.unit_entities += 1
+                       i += 1
+                       toolcontext.info("Execute doc-unit {du.testcase.attrs["name"]} in {file} {i}", 1)
+                       var res2 = sys.system("{file.to_program_name}.bin {i} >>'{file}.out1' 2>&1 </dev/null")
+
+                       var msg
+                       f = new FileReader.open("{file}.out1")
+                       var n2
+                       n2 = new HTMLTag("system-err")
+                       tc.add n2
+                       msg = f.read_all
+                       f.close
+
+                       n2 = new HTMLTag("system-out")
+                       tc.add n2
+                       n2.append(du.block)
+
+                       if res2 != 0 then
+                               var ne = new HTMLTag("error")
+                               ne.attr("message", msg)
+                               tc.add ne
+                               toolcontext.warning(du.mdoc.location, "error", "ERROR: {tc.attrs["classname"]}.{tc.attrs["name"]} (in {file}): {msg}")
+                               toolcontext.modelbuilder.failed_entities += 1
+                       end
                        toolcontext.check_errors
+
+                       testsuite.add(tc)
                end
-               var cmd = "{nitg} --ignore-visibility --no-color '{file}' -I {mmodule.location.file.filename.dirname} >'{file}.out1' 2>&1 </dev/null -o '{file}.bin'"
-               var res = sys.system(cmd)
+       end
+
+       # Executes a single doc-unit in its own program.
+       # Used for docunits larger than a single block of code (with modules, classes, functions etc.)
+       fun test_single_docunit(du: DocUnit)
+       do
+               var tc = du.testcase
+               toolcontext.modelbuilder.unit_entities += 1
+
+               cpt += 1
+               var file = "{prefix}-{cpt}.nit"
+
+               toolcontext.info("Execute doc-unit {tc.attrs["name"]} in {file}", 1)
+
+               var f
+               f = create_unitfile(file)
+               f.write(du.block)
+               f.close
+
+               if toolcontext.opt_noact.value then return
+
+               var res = compile_unitfile(file)
                var res2 = 0
                if res == 0 then
                        res2 = sys.system("{file.to_program_name}.bin >>'{file}.out1' 2>&1 </dev/null")
                end
 
                var msg
-               f = new IFStream.open("{file}.out1")
+               f = new FileReader.open("{file}.out1")
                var n2
                n2 = new HTMLTag("system-err")
                tc.add n2
@@ -143,57 +241,105 @@ class NitUnitExecutor
 
                n2 = new HTMLTag("system-out")
                tc.add n2
-               for text in block do n2.append(text)
+               n2.append(du.block)
 
 
                if res != 0 then
                        var ne = new HTMLTag("failure")
                        ne.attr("message", msg)
                        tc.add ne
-                       toolcontext.warning(ndoc.location, "failure", "FAILURE: {tc.attrs["classname"]}.{tc.attrs["name"]} (in {file}): {msg}")
+                       toolcontext.warning(du.mdoc.location, "failure", "FAILURE: {tc.attrs["classname"]}.{tc.attrs["name"]} (in {file}): {msg}")
                        toolcontext.modelbuilder.failed_entities += 1
                else if res2 != 0 then
                        var ne = new HTMLTag("error")
                        ne.attr("message", msg)
                        tc.add ne
-                       toolcontext.warning(ndoc.location, "error", "ERROR: {tc.attrs["classname"]}.{tc.attrs["name"]} (in {file}): {msg}")
+                       toolcontext.warning(du.mdoc.location, "error", "ERROR: {tc.attrs["classname"]}.{tc.attrs["name"]} (in {file}): {msg}")
                        toolcontext.modelbuilder.failed_entities += 1
                end
                toolcontext.check_errors
 
                testsuite.add(tc)
        end
-end
 
-class SearchAssertVisitor
-       super Visitor
-       var foundit = false
-       redef fun visit(node)
+       # Create and fill the header of a unit file `file`.
+       #
+       # A unit file is a Nit source file generated from one
+       # or more docunits that will be compiled and executed.
+       #
+       # The handled on the file is returned and must be completed and closed.
+       #
+       # `file` should be a valid filepath for a Nit source file.
+       private fun create_unitfile(file: String): Writer
        do
-               if foundit then
-                       return
-               else if node isa AAssertExpr then
-                       foundit = true
-                       return
-               else
-                       node.visit_all(self)
+               var dir = file.dirname
+               if dir != "" then dir.mkdir
+               var f
+               f = new FileWriter.open(file)
+               f.write("# GENERATED FILE\n")
+               f.write("# Docunits extracted from comments\n")
+               if mmodule != null then
+                       f.write("import {mmodule.name}\n")
+               end
+               f.write("\n")
+               return f
+       end
+
+       # Compile an unit file and return the compiler return code
+       #
+       # Can terminate the program if the compiler is not found
+       private fun compile_unitfile(file: String): Int
+       do
+               var nit_dir = toolcontext.nit_dir
+               var nitc = nit_dir/"bin/nitc"
+               if not nitc.file_exists then
+                       toolcontext.error(null, "Error: cannot find nitc. Set envvar NIT_DIR.")
+                       toolcontext.check_errors
+               end
+               var opts = new Array[String]
+               if mmodule != null then
+                       opts.add "-I {mmodule.location.file.filename.dirname}"
                end
+               var cmd = "{nitc} --ignore-visibility --no-color '{file}' {opts.join(" ")} >'{file}.out1' 2>&1 </dev/null -o '{file}.bin'"
+               var res = sys.system(cmd)
+               return res
        end
 end
 
+# A unit-test to run
+class DocUnit
+       # The doc that contains self
+       var mdoc: MDoc
+
+       # The XML node that contains the information about the execution
+       var testcase: HTMLTag
+
+       # The text of the code to execute
+       var block: String
+end
+
 redef class ModelBuilder
+       # Total number analyzed `MEntity`
        var total_entities = 0
+
+       # The number of `MEntity` that have some documentation
        var doc_entities = 0
+
+       # The total number of executed docunits
        var unit_entities = 0
+
+       # The number failed docunits
        var failed_entities = 0
 
+       # Extracts and executes all the docunits in the `mmodule`
+       # Returns a JUnit-compatible `<testsuite>` XML element that contains the results of the executions.
        fun test_markdown(mmodule: MModule): HTMLTag
        do
                var ts = new HTMLTag("testsuite")
                toolcontext.info("nitunit: doc-unit {mmodule}", 2)
-               if not mmodule2nmodule.has_key(mmodule) then return ts
 
-               var nmodule = mmodule2nmodule[mmodule]
+               var nmodule = mmodule2node(mmodule)
+               if nmodule == null then return ts
 
                # usualy, only the original module must be imported in the unit test.
                var o = mmodule
@@ -223,7 +369,7 @@ redef class ModelBuilder
                        # NOTE: jenkins expects a '.' in the classname attr
                        tc.attr("classname", "nitunit." + mmodule.full_name + ".<module>")
                        tc.attr("name", "<module>")
-                       d2m.extract(ndoc, tc)
+                       d2m.extract(ndoc.to_mdoc, tc)
                end label x
                for nclassdef in nmodule.n_classdefs do
                        var mclassdef = nclassdef.mclassdef
@@ -236,7 +382,7 @@ redef class ModelBuilder
                                        tc = new HTMLTag("testcase")
                                        tc.attr("classname", "nitunit." + mmodule.full_name + "." + mclassdef.mclass.full_name)
                                        tc.attr("name", "<class>")
-                                       d2m.extract(ndoc, tc)
+                                       d2m.extract(ndoc.to_mdoc, tc)
                                end
                        end
                        for npropdef in nclassdef.n_propdefs do
@@ -249,11 +395,76 @@ redef class ModelBuilder
                                        tc = new HTMLTag("testcase")
                                        tc.attr("classname", "nitunit." + mmodule.full_name + "." + mclassdef.mclass.full_name)
                                        tc.attr("name", mpropdef.mproperty.full_name)
-                                       d2m.extract(ndoc, tc)
+                                       d2m.extract(ndoc.to_mdoc, tc)
                                end
                        end
                end
 
+               d2m.run_tests
+
+               return ts
+       end
+
+       # Extracts and executes all the docunits in the readme of the `mgroup`
+       # Returns a JUnit-compatible `<testsuite>` XML element that contains the results of the executions.
+       fun test_group(mgroup: MGroup): HTMLTag
+       do
+               var ts = new HTMLTag("testsuite")
+               toolcontext.info("nitunit: doc-unit group {mgroup}", 2)
+
+               # usually, only the default module must be imported in the unit test.
+               var o = mgroup.default_mmodule
+
+               ts.attr("package", mgroup.full_name)
+
+               var prefix = toolcontext.test_dir
+               prefix = prefix.join_path(mgroup.to_s)
+               var d2m = new NitUnitExecutor(toolcontext, prefix, o, ts)
+
+               var tc
+
+               total_entities += 1
+               var mdoc = mgroup.mdoc
+               if mdoc == null then return ts
+
+               doc_entities += 1
+               tc = new HTMLTag("testcase")
+               # NOTE: jenkins expects a '.' in the classname attr
+               tc.attr("classname", "nitunit." + mgroup.full_name)
+               tc.attr("name", "<group>")
+               d2m.extract(mdoc, tc)
+
+               d2m.run_tests
+
+               return ts
+       end
+
+       # Test a document object unrelated to a Nit entity
+       fun test_mdoc(mdoc: MDoc): HTMLTag
+       do
+               var ts = new HTMLTag("testsuite")
+               var file = mdoc.location.to_s
+
+               toolcontext.info("nitunit: doc-unit file {file}", 2)
+
+               ts.attr("package", file)
+
+               var prefix = toolcontext.test_dir / "file"
+               var d2m = new NitUnitExecutor(toolcontext, prefix, null, ts)
+
+               var tc
+
+               total_entities += 1
+               doc_entities += 1
+
+               tc = new HTMLTag("testcase")
+               # NOTE: jenkins expects a '.' in the classname attr
+               tc.attr("classname", "nitunit.<file>")
+               tc.attr("name", file)
+
+               d2m.extract(mdoc, tc)
+               d2m.run_tests
+
                return ts
        end
 end