modzero/GrpcCalculator
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Test and fix the "operator after equals" case.

Browse Source
This commit is contained in:
Gender Shrapnel
2024-02-08 18:19:48 +01:00
parent 719444c06e
commit b586bfe11e
2 changed files with 24 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
Server/Calculator.cs
View File

@@ -44,15 +44,14 @@ public record Calculator(CalculatorState State, string LeftOperand, CalculatorOp
public Calculator() : this(CalculatorState.AfterEquals, "0", null, "0") { } public Calculator() : this(CalculatorState.AfterEquals, "0", null, "0") { }
public Calculator OperatorPressed(CalculatorOperator op) => this with public Calculator OperatorPressed(CalculatorOperator op) => new(
{ LeftOperand: State switch {
LeftOperand = State switch { CalculatorState.AfterOperator or CalculatorState.AfterEquals => Display,
CalculatorState.AfterOperator or CalculatorState.AfterEquals => RightOperand,
CalculatorState.AfterDigit => Evaluate(), CalculatorState.AfterDigit => Evaluate(),
}, },
Operator = op, Operator: op,
State = CalculatorState.AfterOperator, RightOperand: Display,
}; State: CalculatorState.AfterOperator);
public Calculator EqualsPressed() => this with { public Calculator EqualsPressed() => this with {
LeftOperand = Evaluate(), LeftOperand = Evaluate(),
@@ -61,7 +60,7 @@ public record Calculator(CalculatorState State, string LeftOperand, CalculatorOp
public Calculator DigitPressed(string digit) => this with { public Calculator DigitPressed(string digit) => this with {
LeftOperand = State switch { LeftOperand = State switch {
CalculatorState.AfterEquals or CalculatorState.AfterOperator => RightOperand, CalculatorState.AfterEquals or CalculatorState.AfterOperator => Display,
CalculatorState.AfterDigit => LeftOperand, CalculatorState.AfterDigit => LeftOperand,
}, },
RightOperand = State switch { RightOperand = State switch {

15
ServerTests/CalculatorTests.cs
View File

@@ -40,4 +40,19 @@ public class CalculatorTests
calculator = calculator.EqualsPressed(); calculator = calculator.EqualsPressed();
Assert.Equal("8", calculator.Display); Assert.Equal("8", calculator.Display);
} }
[Fact]
public void OperatorAfterEquals()
{
var calculator = new Calculator()
.DigitPressed("2")
.OperatorPressed(CalculatorOperator.Multiplication)
.DigitPressed("3")
.EqualsPressed();
Assert.Equal("6", calculator.Display);
calculator = calculator.OperatorPressed(CalculatorOperator.Addition);
Assert.Equal("6", calculator.Display);
calculator = calculator.EqualsPressed();
Assert.Equal("12", calculator.Display);
}
} }