Merge pull request #119 from yassinebenaid/dev

`e2e`: cover more redirection cases & add support for test filtering

bunster_test.go

@@ -42,6 +42,8 @@ var dump = (&godump.Dumper{
 }).Sprintln
 
 func TestBunster(t *testing.T) {
+	filter := os.Getenv("FILTER")
+
 	buildWorkdir, err := prepareBuildAssets()
 	if err != nil {
 		t.Fatalf("Failed to prepare the build assets, %v", err)
@@ -52,6 +54,8 @@ func TestBunster(t *testing.T) {
 		t.Fatalf("Failed to `Glob` test files, %v", err)
 	}
 
+	var testsHasRan int // number of tests that has ran
+
 	for _, testFile := range testFiles {
 		t.Run(testFile, func(t *testing.T) {
 			testContent, err := os.ReadFile(testFile)
@@ -66,6 +70,12 @@ func TestBunster(t *testing.T) {
 			}
 
 			for i, testCase := range test.Cases {
+				if !strings.Contains(testCase.Name, filter) {
+					// we support filtering, someone would want to run specific tests.
+					continue
+				}
+				testsHasRan++
+
 				workdir, err := setupWorkdir()
 				if err != nil {
 					t.Fatalf("Failed to setup test workdir, %v", err)
@@ -134,6 +144,10 @@ func TestBunster(t *testing.T) {
 			}
 		})
 	}
+
+	if testsHasRan == 0 {
+		t.Fatalf("\nNo tests has ran.")
+	}
 }
 
 func buildBinary(workdir string, s []byte) (string, error) {

tests/01-redirections.yml

@@ -120,3 +120,34 @@ cases:
       stderr: "redirected to stderr\n"
       files:
         "file.txt": "Hello World\n"
+
+  - name: "`<&` file descriptor duplication"
+    files:
+      "file.txt": "Hello World"
+    script: |
+      # duplicate the standard io
+      cat 3<<<'foobar' <&3
+
+      # duplicate an open file
+      cat 3<file.txt <&3
+
+      # redundant duplication
+      cat 3<file.txt 4<&3 0<&4
+    expect:
+      stdout: "foobar\nHello WorldHello World"
+      files:
+        "file.txt": "Hello World"
+
+  - name: "`<>` open file for reading and writing"
+    files:
+      "file.txt": "Hello World"
+    script: |
+      # read from
+      cat <>file.txt
+
+      # write to
+      cat <<<foobar 3<>file.txt >&3
+    expect:
+      stdout: "Hello World"
+      files:
+        "file.txt": "foobar\norld" # the 'W' character was removed because the content was overriden without truncation