func parseAndEval(input string) (*big.Rat, error) {
tokens, err := lex.Lex([]byte(input))
if err != nil {
return nil, err
}
tree, err := parse.Parse(tokens)
if err != nil {
return nil, err
}
result, err := eval.Eval(tree)
if err != nil {
return nil, err
}
return result, nil
}
func testParseCasesWithFormat(t *testing.T, parseTestCases []parseTestCaseWithFormat) {
for i, tc := range parseTestCases {
tcInfo := fmt.Sprintf("test case: %d\ninput: %s", i, tc.input)
tokens, err := lex.Lex([]byte(tc.input))
require.NoError(t, err, tcInfo)
output, err := Parse(tokens)
if tc.expectedError != nil {
require.Error(t, err, tcInfo)
assert.Exactly(t, tc.expectedError, err, tcInfo)
} else {
require.NoError(t, err, tcInfo)
assert.Exactly(t, tc.expectedOutput, output.Format(0), "%s\n\nExpected:\n%s\n\nGot:\n%s\n\n", tcInfo, tc.expectedOutput, output.Format(0))
}
}
}