tests/float/float_struct_e.py: Add specific test for struct 'e' type.

dpgeorge · dpgeorge · commit c11f82740434 · 2024-03-20T13:50:37.000+11:00
Signed-off-by: Damien George &lt;damien@micropython.org&gt;
diff --git a/tests/float/float_struct_e.py b/tests/float/float_struct_e.py
@@ -0,0 +1,22 @@
+# Test struct pack/unpack with 'e' typecode.
+
+try:
+    import struct
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+test_values = (1e-7, 1e-6, 1e-5, 1e-4, 1e-3, 1e-2, 0, 0.1, 1, 2, 4, 8, 10, 100, 1000, 1e4, 6e4)
+
+for j in test_values:
+    for i in (j, -j):
+        x = struct.pack("e", i)
+        v = struct.unpack("e", x)[0]
+        print("%.7f %s %.15f %s" % (i, x, v, i == v))
+
+# In CPython, packing a float that doesn't fit into a half-float raises OverflowError.
+# But in MicroPython it does not, but rather stores the value as inf.
+try:
+    struct.pack("e", 1e15)
+except OverflowError:
+    pass
