tests/float/float_format_ints.py: Put power-of-10 test in separate file.

This test doesn't pass on builds with 30-bit floats (object repr C).

Signed-off-by: Damien George <damien@micropython.org>

tests/float/float_format_ints.py

@@ -12,12 +12,6 @@ for b in [13, 123, 457, 23456]:
             print(title, "with format", f_fmt, "gives", f_fmt.format(f))
             print(title, "with format", g_fmt, "gives", g_fmt.format(f))
 
-# Check that powers of 10 (that fit in float32) format correctly.
-for i in range(31):
-    # It works to 12 digits on all platforms *except* qemu-arm, where
-    # 10^11 comes out as 10000000820 or something.
-    print("{:.7g}".format(float("1e" + str(i))))
-
 # 16777215 is 2^24 - 1, the largest integer that can be completely held
 # in a float32.
 print("{:f}".format(16777215))

tests/float/float_format_ints_power10.py

@@ -0,0 +1,8 @@
+# Test that integers format to exact values.
+# This test requires at least 32-bit floats (won't work with 30-bit).
+
+# Check that powers of 10 (that fit in float32) format correctly.
+for i in range(31):
+    # It works to 12 digits on all platforms *except* qemu-arm, where
+    # 10^11 comes out as 10000000820 or something.
+    print(i, "{:.7g}".format(float("1e" + str(i))))

tests/run-tests.py

@@ -525,6 +525,7 @@ def run_tests(pyb, tests, args, result_dir, num_threads=1):
         )  # requires fp32, there's string_format_fp30.py instead
         skip_tests.add("float/bytes_construct.py")  # requires fp32
         skip_tests.add("float/bytearray_construct.py")  # requires fp32
+        skip_tests.add("float/float_format_ints_power10.py")  # requires fp32
     if upy_float_precision < 64:
         skip_tests.add("float/float_divmod.py")  # tested by float/float_divmod_relaxed.py instead
         skip_tests.add("float/float2int_doubleprec_intbig.py")