add tests for error cases

internal/processor/float-parse_test.go

@@ -48,3 +48,38 @@ func TestGoodFloatParse(t *testing.T) {
 		})
 	}
 }
+
+func TestBadFloatParse(t *testing.T) {
+	floatParser := processor.FloatParse{}
+	tests := []struct {
+		processor   processor.Processor
+		name        string
+		payload     any
+		errorString string
+	}{
+		{
+			name:        "non-string input",
+			payload:     []byte{0x01},
+			errorString: "float.parse processor only accepts a string",
+		},
+		{
+			name:        "not float string",
+			payload:     "abcd",
+			errorString: "strconv.ParseFloat: parsing \"abcd\": invalid syntax",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := floatParser.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Errorf("float.parse expected to fail but succeeded, got: %v", got)
+
+			}
+			if err.Error() != test.errorString {
+				t.Errorf("float.parse got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}

internal/processor/int-parse_test.go

@@ -48,3 +48,38 @@ func TestGoodIntParse(t *testing.T) {
 		})
 	}
 }
+
+func TestBadIntParse(t *testing.T) {
+	intParser := processor.IntParse{}
+	tests := []struct {
+		processor   processor.Processor
+		name        string
+		payload     any
+		errorString string
+	}{
+		{
+			name:        "non-string input",
+			payload:     []byte{0x01},
+			errorString: "int.parse processor only accepts a string",
+		},
+		{
+			name:        "not int string",
+			payload:     "123.46",
+			errorString: "strconv.ParseInt: parsing \"123.46\": invalid syntax",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := intParser.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Errorf("int.parse expected to fail but succeeded, got: %v", got)
+
+			}
+			if err.Error() != test.errorString {
+				t.Errorf("int.parse got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}

internal/processor/string-decode_test.go

@@ -39,3 +39,33 @@ func TestGoodStringDecode(t *testing.T) {
 		})
 	}
 }
+
+func TestBadStringDecode(t *testing.T) {
+	stringDecoder := processor.StringDecode{}
+	tests := []struct {
+		processor   processor.Processor
+		name        string
+		payload     any
+		errorString string
+	}{
+		{
+			processor:   &stringDecoder,
+			name:        "non-[]byte input",
+			payload:     "hello",
+			errorString: "string.decode processor only accepts a []byte",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := test.processor.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Errorf("string.decode expected to fail but got payload: %s", got)
+			}
+			if err.Error() != test.errorString {
+				t.Errorf("string.decode got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}

internal/processor/string-encode_test.go

@@ -40,3 +40,33 @@ func TestGoodStringEncode(t *testing.T) {
 		})
 	}
 }
+
+func TestBadStringEncode(t *testing.T) {
+	stringEncoder := processor.StringEncode{}
+	tests := []struct {
+		processor   processor.Processor
+		name        string
+		payload     any
+		errorString string
+	}{
+		{
+			processor:   &stringEncoder,
+			name:        "non-string input",
+			payload:     []byte{0x68, 0x65, 0x6c, 0x6c, 0x6f},
+			errorString: "string.encode processor only accepts a string",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := test.processor.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Errorf("string.encode expected to fail but got payload: %s", got)
+			}
+			if err.Error() != test.errorString {
+				t.Errorf("string.encode got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}

internal/processor/uint-parse_test.go

@@ -43,3 +43,38 @@ func TestGoodUintParse(t *testing.T) {
 		})
 	}
 }
+
+func TestBadUintParse(t *testing.T) {
+	uintParser := processor.UintParse{}
+	tests := []struct {
+		processor   processor.Processor
+		name        string
+		payload     any
+		errorString string
+	}{
+		{
+			name:        "non-string input",
+			payload:     []byte{0x01},
+			errorString: "uint.parse processor only accepts a string",
+		},
+		{
+			name:        "not uint string",
+			payload:     "-1234",
+			errorString: "strconv.ParseUint: parsing \"-1234\": invalid syntax",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			got, err := uintParser.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Errorf("uint.parse expected to fail but succeeded, got: %v", got)
+
+			}
+			if err.Error() != test.errorString {
+				t.Errorf("uint.parse got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}