init:

example/c-sum/sum.jdg

@@ -0,0 +1,75 @@
+// Cross-platform C solution test suite.
+// $CC is supplied by CI matrix (gcc / clang / cl).
+//
+// Run locally:
+//   CC=gcc   judge sum.jdg .
+//   CC=clang judge sum.jdg .
+//
+// Under MSVC on CI we use build_windows (cl's CLI is different).
+
+build         "$CC -O2 -std=c11 -Wall -Wextra solution.c -o solution"
+build_windows "cl /nologo /O2 /W3 solution.c /Fe:solution.exe"
+
+binary = "solution"
+timeout 5s
+
+// Windows printf emits \r\n; normalize so tests are portable.
+normalize_crlf   = true
+trim_trailing_ws = true
+
+group("basic") {
+    weight = 0.4
+    timeout = 2s
+
+    test("one number") {
+        stdin  = "1\n42\n"
+        stdout = "42\n"
+    }
+
+    test("three numbers") {
+        stdin  = "3\n1 2 3\n"
+        stdout = "6\n"
+    }
+
+    test("negatives") {
+        stdin  = "4\n-1 -2 3 5\n"
+        stdout = "5\n"
+    }
+
+    test("zero count") {
+        stdin  = "0\n"
+        stdout = "0\n"
+    }
+}
+
+group("edge") {
+    weight = 0.3
+
+    test("large sum fits in int64") {
+        stdin  = "3\n2000000000 2000000000 2000000000\n"
+        stdout = "6000000000\n"
+    }
+
+    test("multiline input") {
+        stdin = """
+            5
+            10
+            20
+            30
+            40
+            50
+        """
+        stdout = "150\n"
+    }
+}
+
+group("stress") {
+    weight  = 0.3
+    timeout = 3s
+    scoring = all_or_none
+
+    test("sum of 1..100") {
+        stdin  = "100\n1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100\n"
+        stdout = "5050\n"
+    }
+}