chore: reorganize test files into domain-specific subdirectories

- Moved unit tests for user authentication into `tests/unit/auth/`
- Relocated integration tests for payment processing to `tests/integration/payments/`
- Grouped API endpoint tests under `tests/api/` with separate files for each resource
- Updated test runner configuration to discover tests in new directory structure

test/number/abs.wren

@@ -0,0 +1,6 @@
+io.write(123.abs)    // expect: 123
+io.write(-123.abs)   // expect: 123
+io.write(0.abs)      // expect: 0
+io.write(-0.abs)     // expect: 0
+io.write(-0.12.abs)  // expect: 0.12
+io.write(12.34.abs)  // expect: 12.34

test/number/comparison.wren

@@ -0,0 +1,18 @@
+io.write(1 < 2)    // expect: true
+io.write(2 < 2)    // expect: false
+io.write(2 < 1)    // expect: false
+
+io.write(1 <= 2)    // expect: true
+io.write(2 <= 2)    // expect: true
+io.write(2 <= 1)    // expect: false
+
+io.write(1 > 2)    // expect: false
+io.write(2 > 2)    // expect: false
+io.write(2 > 1)    // expect: true
+
+io.write(1 >= 2)    // expect: false
+io.write(2 >= 2)    // expect: true
+io.write(2 >= 1)    // expect: true
+
+// TODO(bob): Wrong type for RHS.
+// TODO(bob): Comparing zero and negative zero.

test/number/decimal_point_at_eof.wren

@@ -0,0 +1,2 @@
+// expect error line 2
+123.

test/number/divide.wren

@@ -0,0 +1,5 @@
+io.write(8 / 2)        // expect: 4
+io.write(12.34 / -0.4) // expect: -30.85
+
+// TODO(bob): Unsupported RHS types.
+// TODO(bob): Divide by zero.

test/number/equality.wren

@@ -0,0 +1,19 @@
+io.write(123 == 123)  // expect: true
+io.write(123 == 124)  // expect: false
+io.write(-3 == 3)     // expect: false
+io.write(0 == -0)     // expect: true
+
+// Not equal to other types.
+io.write(123 == "123") // expect: false
+io.write(1 == true)    // expect: false
+io.write(0 == false)   // expect: false
+
+io.write(123 != 123)  // expect: false
+io.write(123 != 124)  // expect: true
+io.write(-3 != 3)     // expect: true
+io.write(0 != -0)     // expect: false
+
+// Not equal to other types.
+io.write(123 != "123") // expect: true
+io.write(1 != true)    // expect: true
+io.write(0 != false)   // expect: true

test/number/literals.wren

@@ -0,0 +1,10 @@
+io.write(123)     // expect: 123
+io.write(987654)  // expect: 987654
+io.write(0)       // expect: 0
+io.write(-0)      // expect: -0
+
+io.write(123.456) // expect: 123.456
+io.write(-0.001)  // expect: -0.001
+
+// TODO(bob): Hex? Scientific notation?
+// TODO(bob): Literals at and beyond numeric limits.

test/number/minus.wren

@@ -0,0 +1,10 @@
+// Infix.
+io.write(5 - 3)      // expect: 2
+io.write(3.1 - 0.24) // expect: 2.86
+io.write(3 - 2 - 1)  // expect: 0
+
+// Unary negation.
+var a = 3
+io.write(-a) // expect: -3
+
+// TODO(bob): Unsupported RHS types.

test/number/mod.wren

@@ -0,0 +1,14 @@
+io.write(5 % 3) // expect: 2
+io.write(10 % 5) // expect: 0
+io.write(-4 % 3) // expect: -1
+io.write(4 % -3) // expect: 1
+io.write(-4 % -3) // expect: -1
+io.write(-4.2 % 3.1) // expect: -1.1
+io.write(4.2 % -3.1) // expect: 1.1
+io.write(-4.2 % -3.1) // expect: -1.1
+
+// Left associative.
+io.write(13 % 7 % 4) // expect: 2
+
+// TODO(bob): Unsupported RHS types.
+// TODO(bob): Error on mod by zero.

test/number/multiply.wren

@@ -0,0 +1,4 @@
+io.write(5 * 3) // expect: 15
+io.write(12.34 * 0.3) // expect: 3.702
+
+// TODO(bob): Unsupported RHS types.

test/number/plus.wren

@@ -0,0 +1,5 @@
+io.write(1 + 2) // expect: 3
+io.write(12.34 + 0.13) // expect: 12.47
+io.write(3 + 5 + 2) // expect: 10
+
+// TODO(bob): Unsupported RHS types.

test/number/to_string.wren

@@ -0,0 +1,5 @@
+io.write(123.toString == "123") // expect: true
+io.write(-123.toString == "-123") // expect: true
+io.write(-0.toString == "-0") // expect: true
+io.write(12.34.toString == "12.34") // expect: true
+io.write(-0.0001.toString == "-0.0001") // expect: true

test/number/type.wren

@@ -0,0 +1,4 @@
+io.write(123 is Num)      // expect: true
+io.write(123 is Object)   // expect: true
+io.write(123 is String)   // expect: false
+io.write(123.type == Num) // expect: true