tetragon: Add test for execParse with just filename

Signed-off-by: Jiri Olsa <[email protected]>

Author: olsajiri

pkg/sensors/exec/exec_test.go

@@ -1022,6 +1022,33 @@ func TestExecParse(t *testing.T) {
 		assert.Equal(t, string(cwd), decCwd)
 	})
 
+	t.Run("7", func(t *testing.T) {
+		observer.DataPurge()
+
+		// - filename (string)
+		// - no args
+		// - no cwd
+
+		exec.Flags = 0
+		exec.Size = uint32(processapi.MSG_SIZEOF_EXECVE + len(filename))
+
+		var buf bytes.Buffer
+		binary.Write(&buf, binary.LittleEndian, exec)
+		binary.Write(&buf, binary.LittleEndian, filename)
+
+		reader := bytes.NewReader(buf.Bytes())
+
+		process, err := execParse(reader)
+		require.NoError(t, err)
+
+		assert.Equal(t, string(filename), process.Filename)
+		assert.Empty(t, process.Args)
+
+		decArgs, decCwd := proc.ArgsDecoder(process.Args, process.Flags)
+		assert.Empty(t, decArgs)
+		assert.Empty(t, decCwd)
+	})
+
 	observer.DataPurge()
 }