[Go] Refactor embedding package

embed-code-go/.golangci.yml

@@ -97,6 +97,10 @@ issues:
         - revive
       text: "dot-imports: should not use dot imports"
       path: _test\.go
+    # We may have repeating lines in tests and it should be valid.
+    - linters:
+        - goconst
+      path: _test\.go
   # Excluding test folder as tests are in progress of moving to the source files.
   exclude-dirs:
     - test/

embed-code-go/analyzing/analyzing.go

@@ -64,7 +64,7 @@ func extractAnalyticsForDocs(
 	var changedEmbeddingsLines, problemEmbeddingsLines []string
 
 	for _, docFile := range docFiles {
-		processor := embedding.NewEmbeddingProcessor(docFile, config)
+		processor := embedding.NewProcessor(docFile, config)
 		changedEmbeddings, err := processor.FindChangedEmbeddings()
 
 		// If there is an error during embedding, it is written to the analytics file.

embed-code-go/embedding/embedding_test.go

@@ -0,0 +1,106 @@
+// Copyright 2020, TeamDev. All rights reserved.
+//
+// Redistribution and use in source and/or binary forms, with or without
+// modification, must retain the above copyright notice and the following
+// disclaimer.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package embedding_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"embed-code/embed-code-go/configuration"
+	"embed-code/embed-code-go/embedding"
+	"embed-code/embed-code-go/embedding/parsing"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+func TestEmbedding(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Data Suite")
+}
+
+var _ = Describe("Embedding", func() {
+	var config configuration.Configuration
+
+	BeforeEach(func() {
+		currentDir, err := os.Getwd()
+		if err != nil {
+			Fail("unexpected error during the test setup: " + err.Error())
+		}
+		err = os.Chdir(currentDir)
+		if err != nil {
+			Fail("unexpected error during the test setup: " + err.Error())
+		}
+		config = buildConfigWithPreparedFragments()
+	})
+
+	It("should be up to date", func() {
+		docPath := fmt.Sprintf("%s/whole-file-fragment.md", config.DocumentationRoot)
+		processor := embedding.NewProcessor(docPath, config)
+
+		Expect(processor.Embed()).ShouldNot(HaveOccurred())
+		Expect(processor.IsUpToDate()).Should(BeTrue())
+	})
+
+	It("should be up to date as there is nothing to update", func() {
+		docPath := fmt.Sprintf("%s/no-embedding-doc.md", config.DocumentationRoot)
+		processor := embedding.NewProcessor(docPath, config)
+
+		Expect(processor.Embed()).ShouldNot(HaveOccurred())
+		Expect(processor.IsUpToDate()).Should(BeTrue())
+	})
+
+	It("should have error as it has invalid transition map", func() {
+		docPath := fmt.Sprintf("%s/split-lines.md", config.DocumentationRoot)
+
+		falseTransitions := parsing.TransitionMap{
+			parsing.Start: {parsing.RegularLine, parsing.Finish,
+				parsing.EmbedInstruction},
+			parsing.RegularLine: {parsing.Finish, parsing.EmbedInstruction,
+				parsing.RegularLine},
+			parsing.EmbedInstruction: {parsing.CodeFenceStart, parsing.BlankLine},
+			parsing.BlankLine:        {parsing.CodeFenceStart, parsing.BlankLine},
+			parsing.CodeFenceStart:   {parsing.CodeFenceEnd, parsing.CodeSampleLine},
+			parsing.CodeSampleLine:   {parsing.CodeFenceEnd, parsing.CodeSampleLine},
+			parsing.CodeFenceEnd: {parsing.Finish, parsing.EmbedInstruction,
+				parsing.RegularLine},
+		}
+
+		falseProcessor := embedding.NewProcessorWithTransitions(docPath, config, falseTransitions)
+		Expect(falseProcessor.Embed()).Error().Should(HaveOccurred())
+	})
+
+	It("should successfully embed with multi lined tag", func() {
+		docPath := fmt.Sprintf("%s/multi-lined-tag.md", config.DocumentationRoot)
+		processor := embedding.NewProcessor(docPath, config)
+		Expect(processor.Embed()).Error().ShouldNot(HaveOccurred())
+
+		Expect(processor.IsUpToDate()).Should(BeTrue())
+	})
+})
+
+func buildConfigWithPreparedFragments() configuration.Configuration {
+	var config = configuration.NewConfiguration()
+	config.DocumentationRoot = "../test/resources/docs"
+	config.CodeRoot = "../test/resources/code"
+	config.FragmentsDir = "../test/resources/prepared-fragments"
+
+	return config
+}

embed-code-go/embedding/embedding_error.go → embed-code-go/embedding/errors.go

@@ -24,17 +24,28 @@ import (
 	"embed-code/embed-code-go/embedding/parsing"
 )
 
-// Describes an error which occurs if something goes wrong during embedding.
-type EmbeddingError struct {
-	Context parsing.ParsingContext
+// UnexpectedDiffError describes an error which occurs if outdated files are found during
+// the checking.
+type UnexpectedDiffError struct {
+	changedFiles []string
 }
 
-func (err EmbeddingError) Error() string {
-	errorString := fmt.Sprintf("embedding error for file `%s`.", err.Context.MarkdownFile)
+func (e *UnexpectedDiffError) Error() string {
+	return fmt.Sprintf("unexpected diff: %v", e.changedFiles)
+}
+
+// UnexpectedProcessingError describes an error which occurs if something goes wrong during
+// embedding.
+type UnexpectedProcessingError struct {
+	Context parsing.Context
+}
+
+func (e UnexpectedProcessingError) Error() string {
+	errorString := fmt.Sprintf("embedding error for file `%s`.", e.Context.MarkdownFilePath)
 
-	if len(err.Context.EmbeddingsNotFound) > 0 {
+	if len(e.Context.EmbeddingsNotFound) > 0 {
 		embeddingsNotFoundStr := "\nMissing embeddings: \n"
-		for _, emb := range err.Context.EmbeddingsNotFound {
+		for _, emb := range e.Context.EmbeddingsNotFound {
 			embeddingsNotFoundStr += fmt.Sprintf(
 				"%s — %s\n",
 				emb.CodeFile,
@@ -43,15 +54,15 @@ func (err EmbeddingError) Error() string {
 		errorString += embeddingsNotFoundStr
 	}
 
-	if len(err.Context.UnacceptedEmbeddings) > 0 {
-		unacceptedEmbbeddingsStr := "\nUnaccepted embeddings: \n"
-		for _, emb := range err.Context.UnacceptedEmbeddings {
-			unacceptedEmbbeddingsStr += fmt.Sprintf(
+	if len(e.Context.UnacceptedEmbeddings) > 0 {
+		unacceptedEmbeddingStr := "\nUnaccepted embeddings: \n"
+		for _, emb := range e.Context.UnacceptedEmbeddings {
+			unacceptedEmbeddingStr += fmt.Sprintf(
 				"%s — %s\n",
 				emb.CodeFile,
 				emb.Fragment)
 		}
-		errorString += unacceptedEmbbeddingsStr
+		errorString += unacceptedEmbeddingStr
 	}
 
 	return errorString

embed-code-go/embedding/parsing/blank_line.go

@@ -24,28 +24,24 @@ import (
 	"embed-code/embed-code-go/configuration"
 )
 
-// Represents a blank line of a markdown.
-type BlankLine struct{}
+// BlankLineState represents a blank line of a markdown.
+type BlankLineState struct{}
 
-// Reports whether the current line is a blank line.
+// Recognize reports whether the current line is blank.
 //
-// Checks if the current line is empty and not part of a code fence,
-// and if there is an embedding. If these conditions are met, it returns true.
-// Otherwise, it returns false.
-func (b BlankLine) Recognize(context ParsingContext) bool {
-	if !context.ReachedEOF() && strings.TrimSpace(context.CurrentLine()) == "" {
+// Checks if the current line is empty and not part of a code fence, and if there is an embedding.
+// If these conditions are met, it returns true. Otherwise, it returns false.
+func (b BlankLineState) Recognize(context Context) bool {
+	isEmptyString := strings.TrimSpace(context.CurrentLine()) == ""
+	if !context.ReachedEOF() && isEmptyString {
 		return !context.CodeFenceStarted && context.Embedding != nil
 	}
 
 	return false
 }
 
-// Processes a blank line of a markdown.
-//
-// Appends the current line of the context to the result, and moves to the next line.
-//
-// This implementation never returns an error.
-func (b BlankLine) Accept(context *ParsingContext, _ configuration.Configuration) error {
+// Accept appends the current line of the context to the result, and moves to the next line.
+func (b BlankLineState) Accept(context *Context, _ configuration.Configuration) error {
 	line := context.CurrentLine()
 	context.Result = append(context.Result, line)
 	context.ToNextLine()

embed-code-go/embedding/parsing/code_fence_end.go

@@ -24,40 +24,31 @@ import (
 	"embed-code/embed-code-go/configuration"
 )
 
-//
-// Public methods
-//
-
-// Represents the end of a code fence.
-type CodeFenceEnd struct{}
+// CodeFenceEndState represents the end of a code fence.
+type CodeFenceEndState struct{}
 
-// Reports whether the current line is the end of a code fence.
-//
-// The line is a code fence end if:
-//   - the end is not reached;
+// Recognize reports whether the current line meets this conditions:
+//   - the end of file is not reached;
 //   - the code fence has started;
 //   - the current line starts with the appropriate indentation and "```"
 //
 // context — a context of the parsing process.
-func (c CodeFenceEnd) Recognize(context ParsingContext) bool {
-	if !context.ReachedEOF() {
-		indentation := strings.Repeat(" ", context.CodeFenceIndentation)
-
-		return context.CodeFenceStarted && strings.HasPrefix(context.CurrentLine(), indentation+"```")
+func (c CodeFenceEndState) Recognize(context Context) bool {
+	if context.ReachedEOF() {
+		return false
 	}
+	indentation := strings.Repeat(" ", context.CodeFenceIndentation)
 
-	return false
+	return context.CodeFenceStarted && strings.HasPrefix(context.CurrentLine(), indentation+"```")
 }
 
-// Processes the end of a code fence by adding the current line to the result,
-// resetting certain context variables, and moving to the next line.
+// Accept adds the current line to the result, resets certain context variables, and moves to
+// the next line.
 //
 // context — a context of the parsing process.
 //
-// config — a configuration of the embedding.
-//
 // Returns an error if the rendering was not successful.
-func (c CodeFenceEnd) Accept(context *ParsingContext, _ configuration.Configuration) error {
+func (c CodeFenceEndState) Accept(context *Context, _ configuration.Configuration) error {
 	line := context.CurrentLine()
 	err := renderSample(context)
 	context.SetEmbedding(nil)
@@ -73,16 +64,12 @@ func (c CodeFenceEnd) Accept(context *ParsingContext, _ configuration.Configurat
 	return err
 }
 
-//
-// Private methods
-//
-
 // Renders the sample content of the embedding.
 //
 // context — a context of the parsing process.
 //
 // Returns an error if the reading of the embedding's content was not successful.
-func renderSample(context *ParsingContext) error {
+func renderSample(context *Context) error {
 	content, err := context.Embedding.Content()
 	if err != nil {
 		return err

embed-code-go/embedding/parsing/code_fence_start.go

@@ -24,38 +24,26 @@ import (
 	"embed-code/embed-code-go/configuration"
 )
 
-// Represents the start of a code fence.
-type CodeFenceStart struct{}
+// CodeFenceStartState represents the StartState of a code fence.
+type CodeFenceStartState struct{}
 
-//
-// Public methods
-//
-
-// Reports whether the current line is the start of a code fence.
-//
-// The line is a code fence start if the end is not reached and the current line starts with "```".
+// Recognize reports whether the current line is not reached the end and starts with "```".
 //
 // context — a context of the parsing process.
-func (c CodeFenceStart) Recognize(context ParsingContext) bool {
+func (c CodeFenceStartState) Recognize(context Context) bool {
 	if !context.ReachedEOF() {
 		return strings.HasPrefix(strings.TrimSpace(context.CurrentLine()), "```")
 	}
 
 	return false
 }
 
-// Processes the start of a code fence.
-//
-// Appends the current line from the parsing context to the result,
-// sets a flag to indicate that a code fence has started,
-// calculates the indentation level of the code fence, and moves to the next line in the context.
+// Accept appends the current line from the parsing context to the result, sets a flag to indicate
+// that a code fence has started, calculates the indentation level of the code fence, and moves
+// to the next line in the context.
 //
 // context — a context of the parsing process.
-//
-// config — a configuration of the embedding.
-//
-// This implementation never returns an error.
-func (c CodeFenceStart) Accept(context *ParsingContext, _ configuration.Configuration) error {
+func (c CodeFenceStartState) Accept(context *Context, _ configuration.Configuration) error {
 	line := context.CurrentLine()
 	context.Result = append(context.Result, line)
 	context.CodeFenceStarted = true

embed-code-go/embedding/parsing/code_sample_line.go

@@ -18,35 +18,23 @@
 
 package parsing
 
-import (
-	"embed-code/embed-code-go/configuration"
-)
+import "embed-code/embed-code-go/configuration"
 
-// Represents a line of a code sample.
-type CodeSampleLine struct{}
+// CodeSampleLineState represents a line of a code sample.
+type CodeSampleLineState struct{}
 
-//
-// Public methods
-//
-
-// Reports whether the current line is a code sample line.
-//
-// If codeFenceStarted is true and it's not the end of the file,
-// the line is a code sample line.
+// Recognize reports whether the current line is a code sample line: the code fence is started, and
+// it is not the end of a file.
 //
 // context — a context of the parsing process.
-func (c CodeSampleLine) Recognize(context ParsingContext) bool {
+func (c CodeSampleLineState) Recognize(context Context) bool {
 	return !context.ReachedEOF() && context.CodeFenceStarted
 }
 
-// Moves to the next line.
+// Accept moves to the next line.
 //
 // context — a context of the parsing process.
-//
-// config — a configuration of the embedding.
-//
-// This implementation never returns an error.
-func (c CodeSampleLine) Accept(context *ParsingContext, _ configuration.Configuration) error {
+func (c CodeSampleLineState) Accept(context *Context, _ configuration.Configuration) error {
 	context.ToNextLine()
 
 	return nil