1 files changed, 107 insertions, 0 deletions
diff --git a/file_test.go b/file_test.go
new file mode 100644
index 0000000..31e2a3d
--- /dev/null
+++ b/file_test.go
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// SPDX-FileCopyrightText: 2025 M. Shulhan <ms@kilabit.info>
+
+package spdxconv
+
+import (
+	"os"
+	"testing"
+
+	"git.sr.ht/~shulhan/pakakeh.go/lib/test"
+)
+
+func TestFile_all(t *testing.T) {
+	// Populate the test files from `testdata/file_test.txt`.
+
+	var testData *test.Data
+	var err error
+	testData, err = test.LoadData(`testdata/file_test.txt`)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var tempDir = `testdata/file/`
+	testData.ExtractInput(tempDir)
+	t.Chdir(tempDir)
+
+	// Inititalize the SPDXConv instance.
+
+	conv, err := New(`.`)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	for input, _ := range testData.Input {
+		if input == `spdxconv.cfg` {
+			continue
+		}
+
+		f, err := newFile(input, conv.cfg.MaxLineMatch)
+		if err != nil {
+			t.Fatal(err)
+		}
+		f.apply(conv)
+		err = f.write()
+		if err != nil {
+			t.Fatal(err)
+		}
+		got, err := os.ReadFile(input)
+		if err != nil {
+			t.Fatal(err)
+		}
+		test.Assert(t, input+`: after`,
+			string(testData.Output[input]), string(got))
+	}
+}
+
+func TestFile_detectComment(t *testing.T) {
+	type testCase struct {
+		topLines [][]byte
+		expFile  file
+	}
+	listCase := []testCase{{
+		topLines: [][]byte{
+			[]byte(`#!/bin/sh`),
+		},
+		expFile: file{
+			commentPrefix: `# `,
+			hasSheBang:    true,
+		},
+	}, {
+		topLines: [][]byte{
+			[]byte(`# comment`),
+		},
+		expFile: file{
+			commentPrefix: `# `,
+		},
+	}, {
+		topLines: [][]byte{
+			[]byte(`// comment`),
+		},
+		expFile: file{
+			commentPrefix: `// `,
+		},
+	}, {
+		topLines: [][]byte{
+			[]byte(`/*`),
+		},
+		expFile: file{
+			commentPrefix: `// `,
+		},
+	}, {
+		topLines: [][]byte{
+			[]byte(`<!--`),
+		},
+		expFile: file{
+			commentPrefix: `<!-- `,
+			commentSuffix: ` -->`,
+		},
+	}}
+	for _, tc := range listCase {
+		f := file{
+			topLines: tc.topLines,
+		}
+		f.detectComment()
+		f.topLines = nil
+		test.Assert(t, string(tc.topLines[0]), tc.expFile, f)
+	}
+}