refactor method names for reflect/source (#376)

The reflect method should be renamed so it does not collide with
the reflect package name. As is, it makes import reflect in the
code non-idiomatic. Also renamed sourceMode to stay consistent.

Noticed this here: #371

Also, refactor slice equals method

mockgen/mockgen.go

@@ -62,13 +62,13 @@ func main() {
 	var pkg *model.Package
 	var err error
 	if *source != "" {
-		pkg, err = parseFile(*source)
+		pkg, err = sourceMode(*source)
 	} else {
 		if flag.NArg() != 2 {
 			usage()
 			log.Fatal("Expected exactly two arguments")
 		}
-		pkg, err = reflect(flag.Arg(0), strings.Split(flag.Arg(1), ","))
+		pkg, err = reflectMode(flag.Arg(0), strings.Split(flag.Arg(1), ","))
 	}
 	if err != nil {
 		log.Fatalf("Loading input failed: %v", err)

mockgen/mockgen_test.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"reflect"
 	"regexp"
 	"strings"
 	"testing"
@@ -327,29 +328,9 @@ func TestGetArgNames(t *testing.T) {
 			g := generator{}
 
 			result := g.getArgNames(testCase.method)
-			if !testEqSliceStr(t, result, testCase.expected) {
+			if !reflect.DeepEqual(result, testCase.expected) {
 				t.Fatalf("expected %s, got %s", result, testCase.expected)
 			}
 		})
 	}
 }
-
-func testEqSliceStr(t *testing.T, a, b []string) bool {
-	t.Helper()
-
-	if a == nil || b == nil {
-		return false
-	}
-
-	if len(a) != len(b) {
-		return false
-	}
-
-	for i := range a {
-		if a[i] != b[i] {
-			return false
-		}
-	}
-
-	return true
-}

mockgen/parse.go

@@ -41,7 +41,8 @@ var (
 
 // TODO: simplify error reporting
 
-func parseFile(source string) (*model.Package, error) {
+// sourceMode generates mocks via source file.
+func sourceMode(source string) (*model.Package, error) {
 	srcDir, err := filepath.Abs(filepath.Dir(source))
 	if err != nil {
 		return nil, fmt.Errorf("failed getting source directory: %v", err)

mockgen/parse_test.go

@@ -110,6 +110,6 @@ func checkGreeterImports(t *testing.T, imports map[string]string) {
 func Benchmark_parseFile(b *testing.B) {
 	source := "internal/tests/performance/big_interface/big_interface.go"
 	for n := 0; n < b.N; n++ {
-		parseFile(source)
+		sourceMode(source)
 	}
 }

mockgen/reflect.go

@@ -132,7 +132,8 @@ func runInDir(program []byte, dir string) (*model.Package, error) {
 	return run(filepath.Join(tmpDir, progBinary))
 }
 
-func reflect(importPath string, symbols []string) (*model.Package, error) {
+// reflectMode generates mocks via reflection on an interface.
+func reflectMode(importPath string, symbols []string) (*model.Package, error) {
 	// TODO: sanity check arguments
 
 	if *execOnly != "" {