From 0e5fe9b9acac1c97d28412e78b220c696b3c841b Mon Sep 17 00:00:00 2001
From: Elijah Koulaxis <90087463+kx0101@users.noreply.github.com>
Date: Sat, 31 Jan 2026 03:57:51 +0200
Subject: [PATCH] feat: add tests for number semantics (#555)

---
 tests/interpreter/cases/arithmetic/mod.rs     | 52 +++++++++-
 tests/interpreter/cases/arithmetic/tests.yaml | 97 +++++++++++++++++++
 2 files changed, 148 insertions(+), 1 deletion(-)

diff --git a/tests/interpreter/cases/arithmetic/mod.rs b/tests/interpreter/cases/arithmetic/mod.rs
index ac02625..9112bce 100644
--- a/tests/interpreter/cases/arithmetic/mod.rs
+++ b/tests/interpreter/cases/arithmetic/mod.rs
@@ -27,6 +27,34 @@ fn basic() -> Result<()> {
     div {
       21 / 5 == 4.2
     }
+
+    eq1 { 1 == 1.0 }
+    eq2 { 1 == 1.00 }
+    neq1 { 1 != 1.0001 }
+
+    sum { 0.1 + 0.2 == 0.3 }
+    diff { 0.3 - 0.2 == 0.1 }
+    product { 0.1 * 0.2 == 0.02 }
+    quotient { 0.3 / 0.1 == 3.0 }
+
+    lt { 1 < 1.0001 }
+    le { 1 <= 1.0 }
+    gt { 1.0001 > 1 }
+    ge { 1.0 >= 1 }
+    neg_lt { -1 < 0 }
+    neg_le { -1 <= -1 }
+
+    div1 { 1 / 2 == 0.5 }
+    div2 { 5 / 2 == 2.5 }
+
+    neg1 { -1 == -1 }
+    neg2 { -1 + 2 == 1 }
+    neg3 { -(2 + 3) == -5 }
+    neg4 { 1 - -1 == 2 }
+
+    big1 { 1000000000000000000000 + 1 == 1000000000000000000001 }
+    big2 { 2 * 1000000000000000000000 == 2000000000000000000000 }
+    big3 { 2 / 1e18 == 2e-18 }
 "#;
 
     let expected = vec![Value::from_json_str(
@@ -34,7 +62,29 @@ fn basic() -> Result<()> {
     "add" : true,
     "sub" : true,
     "mul" : true,
-    "div" : true
+    "div" : true,
+    "eq1": true,
+    "eq2": true,
+    "neq1": true,
+    "sum": true,
+    "diff": true,
+    "product": true,
+    "quotient": true,
+    "lt": true,
+    "le": true,
+    "gt": true,
+    "ge": true,
+    "neg_lt": true,
+    "neg_le": true,
+    "div1": true,
+    "div2": true,
+    "neg1": true,
+    "neg2": true,
+    "neg3": true,
+    "neg4": true,
+    "big1": true,
+    "big2": true,
+    "big3": true
 }"#,
     )?];
 
diff --git a/tests/interpreter/cases/arithmetic/tests.yaml b/tests/interpreter/cases/arithmetic/tests.yaml
index 2eb706b..7e80d41 100644
--- a/tests/interpreter/cases/arithmetic/tests.yaml
+++ b/tests/interpreter/cases/arithmetic/tests.yaml
@@ -19,3 +19,100 @@ cases:
       c: 1
       d: -2
     
+  - note: integer-float-equality
+    data: {}
+    modules:
+      - |
+        package test
+
+        eq1 = 1 == 1.0
+        eq2 = 1 == 1.00
+        neq1 = 1 != 1.0001
+    query: data.test
+    want_result:
+      eq1: true
+      eq2: true
+      neq1: true
+
+  - note: float-precision
+    data: {}
+    modules:
+      - |
+        package test
+
+        sum = 0.1 + 0.2
+        diff = 0.3 - 0.2
+        product = 0.1 * 0.2
+        quotient = 0.3 / 0.1
+    query: data.test
+    want_result:
+      sum: 0.30000000000000004
+      diff: 0.09999999999999998
+      product: 0.020000000000000004
+      quotient: 2.9999999999999996
+
+  - note: numeric-comparisons
+    data: {}
+    modules:
+      - |
+        package test
+
+        lt = 1 < 1.0001
+        le = 1 <= 1.0
+        gt = 1.0001 > 1
+        ge = 1.0 >= 1
+        neg_lt = -1 < 0
+        neg_le = -1 <= -1
+    query: data.test
+    want_result:
+      lt: true
+      le: true
+      gt: true
+      ge: true
+      neg_lt: true
+      neg_le: true
+
+  - note: division
+    data: {}
+    modules:
+      - |
+        package test
+
+        div1 = 1 / 2
+        div2 = 5 / 2
+    query: data.test
+    want_result:
+      div1: 0.5
+      div2: 2.5
+
+  - note: negative-number-arithmetic
+    data: {}
+    modules:
+      - |
+        package test
+
+        neg1 = -1
+        neg2 = -1 + 2
+        neg3 = 0 - (2 + 3)
+        neg4 = 1 - -1
+    query: data.test
+    want_result:
+      neg1: -1
+      neg2: 1
+      neg3: -5
+      neg4: 2
+
+  - note: big-numbers
+    data: {}
+    modules:
+      - |
+        package test
+
+        big1 = 1000000000000000000000 + 1
+        big2 = 2 * 1000000000000000000000
+        big3 = 2 / 1e18
+    query: data.test
+    want_result:
+      big1: 1000000000000000000001
+      big2: 2000000000000000000000
+      big3: 2e-18