3 files changed, 210 insertions, 0 deletions
diff --git a/tests/01_arithmetic/00_value_conversion b/tests/01_arithmetic/00_value_conversion
new file mode 100644
index 0000000..c44ad00
--- /dev/null
+++ b/tests/01_arithmetic/00_value_conversion
@@ -0,0 +1,125 @@
+Performing unary plus or minus, or performing arithmetic operations may
+implicitly convert non-numeric values to numeric ones.
+
+If an addition is performed and either operand is a string, the other
+operand is converted into a string as well and the addition result is a
+concatenated string consisting of the two operand values.
+
+-- Expect stdout --
+HelloWorld
+12
+34
+true
+false
+null
+{ "some": "object" }
+[ "some", "array" ]
+function() { ... }
+1.2
+Infinity
+124
+123
+123
+NaN
+NaN
+NaN
+124.2
+Infinity
+1
+0
+0
+NaN
+NaN
+NaN
+1.2
+Infinity
+123
+12.3
+NaN
+-1
+0
+0
+NaN
+NaN
+NaN
+-1.2
+-Infinity
+-123
+-12.3
+NaN
+4.2
+9.6
+-- End --
+
+-- Testcase --
+{%
+	print(join("\n", [
+
+		// Adding two strings concatenates them:
+		"Hello" + "World",
+
+		// Adding a number to a string results in a string:
+		"1" + 2,
+
+		// Adding a string to a number results in a string:
+		3 + "4",
+
+		// Adding any non-string value to a string or vice versa will
+		// force stringification of the non-string value
+		"" + true,
+		"" + false,
+		"" + null,
+		"" + { some: "object" },
+		"" + [ "some", "array" ],
+		"" + function() {},
+		"" + 1.2,
+		"" + (1 / 0),
+
+		// Adding a numeric value to a non-string, non-numeric value
+		// or vice versa will convert the non-numeric argument to a
+		// number
+		123 + true,
+		123 + false,
+		123 + null,
+		123 + { some: "object" },
+		123 + [ "some", "array" ],
+		123 + function() {},
+		123 + 1.2,
+		123 + (1 / 0),
+
+		// The unary "+" operator follows the same logic as adding a
+		// non-numeric, non-string value to a numeric one. Additionally
+		// the unary plus forces conversion of string values into numbers
+		+true,
+		+false,
+		+null,
+		+{ some: "object" },
+		+[ "some", "array" ],
+		+function() {},
+		+1.2,
+		+(1 / 0),
+		+"123",
+		+"12.3",
+		+"this is not a number",
+
+		// The unary "-" operator functions like the unary "+" one and
+		// it additionally returns the negation of the numeric value
+		-true,
+		-false,
+		-null,
+		-{ some: "object" },
+		-[ "some", "array" ],
+		-function() {},
+		-1.2,
+		-(1 / 0),
+		-"123",
+		-"12.3",
+		-"this is not a number",
+
+		// Adding a double to an integer or vice versa will force the
+		// result to a double as well
+		1.2 + 3,
+		4 + 5.6,
+
+	"" ]));
+-- End --
diff --git a/tests/01_arithmetic/01_division b/tests/01_arithmetic/01_division
new file mode 100644
index 0000000..d4a2adb
--- /dev/null
+++ b/tests/01_arithmetic/01_division
@@ -0,0 +1,53 @@
+While arithmetic divisions generally follow the value conversion rules
+outlined in the "00_value_conversion" test case, a number of additional
+constraints apply.
+
+-- Expect stdout --
+Division by zero yields Infinity:
+1 / 0 = Infinity
+
+Division by Infinity yields zero:
+1 / Infinity = 0
+
+Dividing Infinity yields Infinity:
+Infinity / 1 = Infinity
+
+Dividing Infinity by Infinity yields NaN:
+Infinity / Infinity = NaN
+
+If either operand is NaN, the result is NaN:
+1 / NaN = NaN
+NaN / 1 = NaN
+
+If both operands are integers, integer division is performed:
+10 / 3 = 3
+
+If either operand is a double, double division is performed:
+10.0 / 3 = 3.33333
+10 / 3.0 = 3.33333
+-- End --
+
+-- Testcase --
+Division by zero yields Infinity:
+1 / 0 = {{ 1 / 0 }}
+
+Division by Infinity yields zero:
+1 / Infinity = {{ 1 / Infinity }}
+
+Dividing Infinity yields Infinity:
+Infinity / 1 = {{ Infinity / 1 }}
+
+Dividing Infinity by Infinity yields NaN:
+Infinity / Infinity = {{ Infinity / Infinity }}
+
+If either operand is NaN, the result is NaN:
+1 / NaN = {{ 1 / NaN }}
+NaN / 1 = {{ NaN / 1 }}
+
+If both operands are integers, integer division is performed:
+10 / 3 = {{ 10 / 3 }}
+
+If either operand is a double, double division is performed:
+10.0 / 3 = {{ 10.0 / 3 }}
+10 / 3.0 = {{ 10 / 3.0 }}
+-- End --
diff --git a/tests/01_arithmetic/02_modulo b/tests/01_arithmetic/02_modulo
new file mode 100644
index 0000000..244d624
--- /dev/null
+++ b/tests/01_arithmetic/02_modulo
@@ -0,0 +1,32 @@
+The utpl language supports modulo divisions, however they're only defined
+for integer values.
+
+-- Expect stdout --
+If both operands are integers or convertible to integers,
+the modulo division yields the remainder:
+10 % 4 = 2
+"10" % 4 = 2
+10 % "4" = 2
+"10" % "4" = 2
+
+If either operand is a double value, the modulo operation
+yields NaN:
+10.0 % 4 = NaN
+10 % 4.0 = NaN
+"10.0" % 4 = NaN
+-- End --
+
+-- Testcase --
+If both operands are integers or convertible to integers,
+the modulo division yields the remainder:
+10 % 4 = {{ 10 % 4 }}
+"10" % 4 = {{ "10" % 4 }}
+10 % "4" = {{ 10 % 4 }}
+"10" % "4" = {{ "10" % "4" }}
+
+If either operand is a double value, the modulo operation
+yields NaN:
+10.0 % 4 = {{ 10.0 % 4 }}
+10 % 4.0 = {{ 10 % 4.0 }}
+"10.0" % 4 = {{ "10.0" % 4 }}
+-- End --