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|
package calculator
import (
"strings"
"testing"
)
func TestParseXPercentOfY(t *testing.T) {
tests := []struct {
name string
input string
expected string
}{
{
name: "20% of 150",
input: "20% of 150",
expected: "20.00% of 150.00 = 30.00",
},
{
name: "what is 20% of 150",
input: "what is 20% of 150",
expected: "20.00% of 150.00 = 30.00",
},
{
name: "50% of 200",
input: "50% of 200",
expected: "50.00% of 200.00 = 100.00",
},
{
name: "decimal percent",
input: "12.5% of 80",
expected: "12.50% of 80.00 = 10.00",
},
{
name: "decimal base",
input: "20% of 75.5",
expected: "20.00% of 75.50 = 15.10",
},
{
name: "without 'of'",
input: "25% 400",
expected: "25.00% of 400.00 = 100.00",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := Parse(tt.input)
if err != nil {
t.Fatalf("Parse(%q) returned error: %v", tt.input, err)
}
if !strings.HasPrefix(result, tt.expected) {
t.Errorf("Parse(%q) = %q, expected to start with %q", tt.input, result, tt.expected)
}
if !strings.Contains(result, "Steps:") {
t.Errorf("Parse(%q) = %q, expected to contain calculation steps", tt.input, result)
}
})
}
}
func TestParseXIsWhatPercentOfY(t *testing.T) {
tests := []struct {
name string
input string
expected string
}{
{
name: "30 is what % of 150",
input: "30 is what % of 150",
expected: "30.00 is 20.00% of 150.00",
},
{
name: "50 is what % of 200",
input: "50 is what % of 200",
expected: "50.00 is 25.00% of 200.00",
},
{
name: "decimal values",
input: "12.5 is what % of 50",
expected: "12.50 is 25.00% of 50.00",
},
{
name: "without spaces around %",
input: "75 is what% of 300",
expected: "75.00 is 25.00% of 300.00",
},
{
name: "without 'of'",
input: "100 is what % 400",
expected: "100.00 is 25.00% of 400.00",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := Parse(tt.input)
if err != nil {
t.Fatalf("Parse(%q) returned error: %v", tt.input, err)
}
if !strings.HasPrefix(result, tt.expected) {
t.Errorf("Parse(%q) = %q, expected to start with %q", tt.input, result, tt.expected)
}
if !strings.Contains(result, "Steps:") {
t.Errorf("Parse(%q) = %q, expected to contain calculation steps", tt.input, result)
}
})
}
}
func TestParseXIsYPercentOfWhat(t *testing.T) {
tests := []struct {
name string
input string
expected string
}{
{
name: "30 is 20% of what",
input: "30 is 20% of what",
expected: "30.00 is 20.00% of 150.00",
},
{
name: "50 is 25% of what",
input: "50 is 25% of what",
expected: "50.00 is 25.00% of 200.00",
},
{
name: "decimal values",
input: "15 is 30% of what",
expected: "15.00 is 30.00% of 50.00",
},
{
name: "without spaces around %",
input: "75 is 25% of what",
expected: "75.00 is 25.00% of 300.00",
},
{
name: "without 'of'",
input: "40 is 20% what",
expected: "40.00 is 20.00% of 200.00",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := Parse(tt.input)
if err != nil {
t.Fatalf("Parse(%q) returned error: %v", tt.input, err)
}
if !strings.HasPrefix(result, tt.expected) {
t.Errorf("Parse(%q) = %q, expected to start with %q", tt.input, result, tt.expected)
}
if !strings.Contains(result, "Steps:") {
t.Errorf("Parse(%q) = %q, expected to contain calculation steps", tt.input, result)
}
})
}
}
func TestParseErrors(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "invalid input",
input: "hello world",
},
{
name: "incomplete input",
input: "20%",
},
{
name: "missing numbers",
input: "% of",
},
{
name: "random text",
input: "calculate percentage",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
_, err := Parse(tt.input)
if err == nil {
t.Errorf("Parse(%q) expected error, got nil", tt.input)
}
})
}
}
func TestParseCaseInsensitive(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "uppercase WHAT IS",
input: "WHAT IS 20% OF 150",
},
{
name: "mixed case What Is",
input: "What Is 20% Of 150",
},
{
name: "uppercase IS WHAT",
input: "30 IS WHAT % OF 150",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
_, err := Parse(tt.input)
if err != nil {
t.Errorf("Parse(%q) should be case-insensitive, got error: %v", tt.input, err)
}
})
}
}
func TestParseDivisionByZero(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "X is what % of 0",
input: "30 is what % of 0",
},
{
name: "X is 0% of what",
input: "30 is 0% of what",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
_, err := Parse(tt.input)
if err == nil {
t.Errorf("Parse(%q) should handle division by zero, expected error", tt.input)
}
})
}
}
func TestParseWhitespace(t *testing.T) {
tests := []struct {
name string
input string
expected string
}{
{
name: "extra spaces",
input: " 20% of 150 ",
expected: "20.00% of 150.00 = 30.00",
},
{
name: "tabs and spaces",
input: "30 is what % of 150",
expected: "30.00 is 20.00% of 150.00",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
result, err := Parse(tt.input)
if err != nil {
t.Fatalf("Parse(%q) returned error: %v", tt.input, err)
}
if !strings.Contains(result, "of") {
t.Errorf("Parse(%q) should handle whitespace properly, got %q", tt.input, result)
}
})
}
}
|
