Cover quantity with tests

pkg/types/quantity_test.go

@@ -5,9 +5,12 @@ Copyright © 2023 NAME HERE <EMAIL ADDRESS>
 package types
 
 import (
+	"encoding/json"
 	"fmt"
 	"testing"
 
+	"gopkg.in/yaml.v3"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -50,3 +53,142 @@ func TestParseQuantity(t *testing.T) {
 		})
 	}
 }
+
+type MarshalQuantityTest struct {
+	input    Quantity
+	expected string
+}
+
+func TestMarshal(t *testing.T) {
+	testCases := map[string]MarshalQuantityTest{
+		"very-few": {
+			input:    VeryFew,
+			expected: "very-few",
+		},
+		"few": {
+			input:    Few,
+			expected: "few",
+		},
+		"many": {
+			input:    Many,
+			expected: "many",
+		},
+		"very-many": {
+			input:    VeryMany,
+			expected: "very-many",
+		},
+	}
+
+	for name, testCase := range testCases {
+		t.Run(name, func(t *testing.T) {
+			var v struct {
+				Quantity Quantity
+			}
+			v.Quantity = testCase.input
+
+			bytes, err := yaml.Marshal(v)
+
+			assert.NoError(t, err)
+			assert.Equal(t, fmt.Sprintf("quantity: %s\n", testCase.expected), string(bytes))
+
+			jsonBytes, err := json.Marshal(v)
+			assert.NoError(t, err)
+			assert.Equal(t, fmt.Sprintf("{\"Quantity\":\"%s\"}", testCase.expected), string(jsonBytes))
+		})
+	}
+}
+
+type UnmarshalQuantityTest struct {
+	input    string
+	expected Quantity
+}
+
+func TestUnmarshal(t *testing.T) {
+	testCases := map[string]UnmarshalQuantityTest{
+		"very-few": {
+			input:    "very-few",
+			expected: VeryFew,
+		},
+		"few": {
+			input:    "few",
+			expected: Few,
+		},
+		"many": {
+			input:    "many",
+			expected: Many,
+		},
+		"very-many": {
+			input:    "very-many",
+			expected: VeryMany,
+		},
+	}
+
+	for name, testCase := range testCases {
+		t.Run(name, func(t *testing.T) {
+			yamlString := fmt.Sprintf("quantity: %s\n", testCase.input)
+			var v struct {
+				Quantity Quantity
+			}
+			err := yaml.Unmarshal([]byte(yamlString), &v)
+
+			assert.NoError(t, err)
+			assert.Equal(t, testCase.expected, v.Quantity)
+
+			jsonString := fmt.Sprintf("{\"Quantity\":\"%s\"}", testCase.input)
+			err = json.Unmarshal([]byte(jsonString), &v)
+
+			assert.NoError(t, err)
+			assert.Equal(t, testCase.expected, v.Quantity)
+		})
+	}
+}
+
+func TestUnmarshallJsonError(t *testing.T) {
+	var v struct {
+		Quantity Quantity
+	}
+	err := json.Unmarshal([]byte("{\"Quantity\":\"unknown\"}"), &v)
+
+	assert.Error(t, err)
+}
+
+func TestUnmarshallYamlError(t *testing.T) {
+	var v struct {
+		Quantity Quantity
+	}
+	err := yaml.Unmarshal([]byte("quantity: unknown\n"), &v)
+
+	assert.Error(t, err)
+}
+
+func TestQuantityValues(t *testing.T) {
+	assert.Equal(t, []TypeEnum{VeryFew, Few, Many, VeryMany}, QuantityValues())
+}
+
+func TestQuantityString(t *testing.T) {
+	assert.Equal(t, "very-few", VeryFew.String())
+	assert.Equal(t, "few", Few.String())
+	assert.Equal(t, "many", Many.String())
+	assert.Equal(t, "very-many", VeryMany.String())
+}
+
+func TestQuantityExplain(t *testing.T) {
+	assert.Equal(t, "Very few", VeryFew.Explain())
+	assert.Equal(t, "Few", Few.Explain())
+	assert.Equal(t, "Many", Many.Explain())
+	assert.Equal(t, "Very many", VeryMany.Explain())
+}
+
+func TestQuantityTitle(t *testing.T) {
+	assert.Equal(t, "very few", VeryFew.Title())
+	assert.Equal(t, "few", Few.Title())
+	assert.Equal(t, "many", Many.Title())
+	assert.Equal(t, "very many", VeryMany.Title())
+}
+
+func TestQuantityQuantityFactor(t *testing.T) {
+	assert.Equal(t, float64(1), VeryFew.QuantityFactor())
+	assert.Equal(t, float64(2), Few.QuantityFactor())
+	assert.Equal(t, float64(3), Many.QuantityFactor())
+	assert.Equal(t, float64(5), VeryMany.QuantityFactor())
+}