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Diffstat (limited to 'tests/unit/test-qdist.c')
| -rw-r--r-- | tests/unit/test-qdist.c | 389 |
1 files changed, 389 insertions, 0 deletions
diff --git a/tests/unit/test-qdist.c b/tests/unit/test-qdist.c new file mode 100644 index 0000000000..9541ce31eb --- /dev/null +++ b/tests/unit/test-qdist.c @@ -0,0 +1,389 @@ +/* + * Copyright (C) 2016, Emilio G. Cota <cota@braap.org> + * + * License: GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ +#include "qemu/osdep.h" +#include "qemu/qdist.h" + +#include <math.h> + +struct entry_desc { + double x; + unsigned long count; + + /* 0 prints a space, 1-8 prints from qdist_blocks[] */ + int fill_code; +}; + +/* See: https://en.wikipedia.org/wiki/Block_Elements */ +static const gunichar qdist_blocks[] = { + 0x2581, + 0x2582, + 0x2583, + 0x2584, + 0x2585, + 0x2586, + 0x2587, + 0x2588 +}; + +#define QDIST_NR_BLOCK_CODES ARRAY_SIZE(qdist_blocks) + +static char *pr_hist(const struct entry_desc *darr, size_t n) +{ + GString *s = g_string_new(""); + size_t i; + + for (i = 0; i < n; i++) { + int fill = darr[i].fill_code; + + if (fill) { + assert(fill <= QDIST_NR_BLOCK_CODES); + g_string_append_unichar(s, qdist_blocks[fill - 1]); + } else { + g_string_append_c(s, ' '); + } + } + return g_string_free(s, FALSE); +} + +static void +histogram_check(const struct qdist *dist, const struct entry_desc *darr, + size_t n, size_t n_bins) +{ + char *pr = qdist_pr_plain(dist, n_bins); + char *str = pr_hist(darr, n); + + g_assert_cmpstr(pr, ==, str); + g_free(pr); + g_free(str); +} + +static void histogram_check_single_full(const struct qdist *dist, size_t n_bins) +{ + struct entry_desc desc = { .fill_code = 8 }; + + histogram_check(dist, &desc, 1, n_bins); +} + +static void +entries_check(const struct qdist *dist, const struct entry_desc *darr, size_t n) +{ + size_t i; + + for (i = 0; i < n; i++) { + struct qdist_entry *e = &dist->entries[i]; + + g_assert_cmpuint(e->count, ==, darr[i].count); + } +} + +static void +entries_insert(struct qdist *dist, const struct entry_desc *darr, size_t n) +{ + size_t i; + + for (i = 0; i < n; i++) { + qdist_add(dist, darr[i].x, darr[i].count); + } +} + +static void do_test_bin(const struct entry_desc *a, size_t n_a, + const struct entry_desc *b, size_t n_b) +{ + struct qdist qda; + struct qdist qdb; + + qdist_init(&qda); + + entries_insert(&qda, a, n_a); + qdist_inc(&qda, a[0].x); + qdist_add(&qda, a[0].x, -1); + + g_assert_cmpuint(qdist_unique_entries(&qda), ==, n_a); + g_assert_cmpfloat(qdist_xmin(&qda), ==, a[0].x); + g_assert_cmpfloat(qdist_xmax(&qda), ==, a[n_a - 1].x); + histogram_check(&qda, a, n_a, 0); + histogram_check(&qda, a, n_a, n_a); + + qdist_bin__internal(&qdb, &qda, n_b); + g_assert_cmpuint(qdb.n, ==, n_b); + entries_check(&qdb, b, n_b); + g_assert_cmpuint(qdist_sample_count(&qda), ==, qdist_sample_count(&qdb)); + /* + * No histogram_check() for $qdb, since we'd rebin it and that is a bug. + * Instead, regenerate it from $qda. + */ + histogram_check(&qda, b, n_b, n_b); + + qdist_destroy(&qdb); + qdist_destroy(&qda); +} + +static void do_test_pr(uint32_t opt) +{ + static const struct entry_desc desc[] = { + [0] = { 1, 900, 8 }, + [1] = { 2, 1, 1 }, + [2] = { 3, 2, 1 } + }; + static const char border[] = "|"; + const char *llabel = NULL; + const char *rlabel = NULL; + struct qdist dist; + GString *s; + char *str; + char *pr; + size_t n; + + n = ARRAY_SIZE(desc); + qdist_init(&dist); + + entries_insert(&dist, desc, n); + histogram_check(&dist, desc, n, 0); + + s = g_string_new(""); + + if (opt & QDIST_PR_LABELS) { + unsigned int lopts = opt & (QDIST_PR_NODECIMAL | + QDIST_PR_PERCENT | + QDIST_PR_100X | + QDIST_PR_NOBINRANGE); + + if (lopts == 0) { + llabel = "[1.0,1.7)"; + rlabel = "[2.3,3.0]"; + } else if (lopts == QDIST_PR_NODECIMAL) { + llabel = "[1,2)"; + rlabel = "[2,3]"; + } else if (lopts == (QDIST_PR_PERCENT | QDIST_PR_NODECIMAL)) { + llabel = "[1,2)%"; + rlabel = "[2,3]%"; + } else if (lopts == QDIST_PR_100X) { + llabel = "[100.0,166.7)"; + rlabel = "[233.3,300.0]"; + } else if (lopts == (QDIST_PR_NOBINRANGE | QDIST_PR_NODECIMAL)) { + llabel = "1"; + rlabel = "3"; + } else { + g_assert_cmpstr("BUG", ==, "This is not meant to be exhaustive"); + } + } + + if (llabel) { + g_string_append(s, llabel); + } + if (opt & QDIST_PR_BORDER) { + g_string_append(s, border); + } + + str = pr_hist(desc, n); + g_string_append(s, str); + g_free(str); + + if (opt & QDIST_PR_BORDER) { + g_string_append(s, border); + } + if (rlabel) { + g_string_append(s, rlabel); + } + + str = g_string_free(s, FALSE); + pr = qdist_pr(&dist, n, opt); + g_assert_cmpstr(pr, ==, str); + g_free(pr); + g_free(str); + + qdist_destroy(&dist); +} + +static inline void do_test_pr_label(uint32_t opt) +{ + opt |= QDIST_PR_LABELS; + do_test_pr(opt); +} + +static void test_pr(void) +{ + do_test_pr(0); + + do_test_pr(QDIST_PR_BORDER); + + /* 100X should be ignored because we're not setting LABELS */ + do_test_pr(QDIST_PR_100X); + + do_test_pr_label(0); + do_test_pr_label(QDIST_PR_NODECIMAL); + do_test_pr_label(QDIST_PR_PERCENT | QDIST_PR_NODECIMAL); + do_test_pr_label(QDIST_PR_100X); + do_test_pr_label(QDIST_PR_NOBINRANGE | QDIST_PR_NODECIMAL); +} + +static void test_bin_shrink(void) +{ + static const struct entry_desc a[] = { + [0] = { 0.0, 42922, 7 }, + [1] = { 0.25, 47834, 8 }, + [2] = { 0.50, 26628, 0 }, + [3] = { 0.625, 597, 4 }, + [4] = { 0.75, 10298, 1 }, + [5] = { 0.875, 22, 2 }, + [6] = { 1.0, 2771, 1 } + }; + static const struct entry_desc b[] = { + [0] = { 0.0, 42922, 7 }, + [1] = { 0.25, 47834, 8 }, + [2] = { 0.50, 27225, 3 }, + [3] = { 0.75, 13091, 1 } + }; + + return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b)); +} + +static void test_bin_expand(void) +{ + static const struct entry_desc a[] = { + [0] = { 0.0, 11713, 5 }, + [1] = { 0.25, 20294, 0 }, + [2] = { 0.50, 17266, 8 }, + [3] = { 0.625, 1506, 0 }, + [4] = { 0.75, 10355, 6 }, + [5] = { 0.833, 2, 1 }, + [6] = { 0.875, 99, 4 }, + [7] = { 1.0, 4301, 2 } + }; + static const struct entry_desc b[] = { + [0] = { 0.0, 11713, 5 }, + [1] = { 0.0, 0, 0 }, + [2] = { 0.0, 20294, 8 }, + [3] = { 0.0, 0, 0 }, + [4] = { 0.0, 0, 0 }, + [5] = { 0.0, 17266, 6 }, + [6] = { 0.0, 1506, 1 }, + [7] = { 0.0, 10355, 4 }, + [8] = { 0.0, 101, 1 }, + [9] = { 0.0, 4301, 2 } + }; + + return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b)); +} + +static void test_bin_precision(void) +{ + static const struct entry_desc a[] = { + [0] = { 0, 213549, 8 }, + [1] = { 1, 70, 1 }, + }; + static const struct entry_desc b[] = { + [0] = { 0, 213549, 8 }, + [1] = { 0, 70, 1 }, + }; + + return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b)); +} + +static void test_bin_simple(void) +{ + static const struct entry_desc a[] = { + [0] = { 10, 101, 8 }, + [1] = { 11, 0, 0 }, + [2] = { 12, 2, 1 } + }; + static const struct entry_desc b[] = { + [0] = { 0, 101, 8 }, + [1] = { 0, 0, 0 }, + [2] = { 0, 0, 0 }, + [3] = { 0, 0, 0 }, + [4] = { 0, 2, 1 } + }; + + return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b)); +} + +static void test_single_full(void) +{ + struct qdist dist; + + qdist_init(&dist); + + qdist_add(&dist, 3, 102); + g_assert_cmpfloat(qdist_avg(&dist), ==, 3); + g_assert_cmpfloat(qdist_xmin(&dist), ==, 3); + g_assert_cmpfloat(qdist_xmax(&dist), ==, 3); + + histogram_check_single_full(&dist, 0); + histogram_check_single_full(&dist, 1); + histogram_check_single_full(&dist, 10); + + qdist_destroy(&dist); +} + +static void test_single_empty(void) +{ + struct qdist dist; + char *pr; + + qdist_init(&dist); + + qdist_add(&dist, 3, 0); + g_assert_cmpuint(qdist_sample_count(&dist), ==, 0); + g_assert(isnan(qdist_avg(&dist))); + g_assert_cmpfloat(qdist_xmin(&dist), ==, 3); + g_assert_cmpfloat(qdist_xmax(&dist), ==, 3); + + pr = qdist_pr_plain(&dist, 0); + g_assert_cmpstr(pr, ==, " "); + g_free(pr); + + pr = qdist_pr_plain(&dist, 1); + g_assert_cmpstr(pr, ==, " "); + g_free(pr); + + pr = qdist_pr_plain(&dist, 2); + g_assert_cmpstr(pr, ==, " "); + g_free(pr); + + qdist_destroy(&dist); +} + +static void test_none(void) +{ + struct qdist dist; + char *pr; + + qdist_init(&dist); + + g_assert(isnan(qdist_avg(&dist))); + g_assert(isnan(qdist_xmin(&dist))); + g_assert(isnan(qdist_xmax(&dist))); + + pr = qdist_pr_plain(&dist, 0); + g_assert_cmpstr(pr, ==, "(empty)"); + g_free(pr); + + pr = qdist_pr_plain(&dist, 2); + g_assert_cmpstr(pr, ==, "(empty)"); + g_free(pr); + + pr = qdist_pr(&dist, 0, QDIST_PR_BORDER); + g_assert_cmpstr(pr, ==, "(empty)"); + g_free(pr); + + qdist_destroy(&dist); +} + +int main(int argc, char *argv[]) +{ + g_test_init(&argc, &argv, NULL); + g_test_add_func("/qdist/none", test_none); + g_test_add_func("/qdist/single/empty", test_single_empty); + g_test_add_func("/qdist/single/full", test_single_full); + g_test_add_func("/qdist/binning/simple", test_bin_simple); + g_test_add_func("/qdist/binning/precision", test_bin_precision); + g_test_add_func("/qdist/binning/expand", test_bin_expand); + g_test_add_func("/qdist/binning/shrink", test_bin_shrink); + g_test_add_func("/qdist/pr", test_pr); + return g_test_run(); +} |