SERVER-40820 Jstestfuzz suite to introduce spurious write conflicts

2 files changed, 28 insertions, 0 deletions

diff --git a/jstests/hooks/disable_write_conflicts.js b/jstests/hooks/disable_write_conflicts.js
new file mode 100644
index 00000000000..42c00693b83
--- /dev/null
+++ b/jstests/hooks/disable_write_conflicts.js
@@ -0,0 +1,9 @@
+(function() {
+'use strict';
+
+assert.commandWorked(
+    db.adminCommand({configureFailPoint: 'WTWriteConflictException', mode: "off"}));
+
+assert.commandWorked(
+    db.adminCommand({configureFailPoint: 'WTWriteConflictExceptionForReads', mode: "off"}));
+})();
diff --git a/jstests/hooks/enable_write_conflicts.js b/jstests/hooks/enable_write_conflicts.js
new file mode 100644
index 00000000000..aae999f4253
--- /dev/null
+++ b/jstests/hooks/enable_write_conflicts.js
@@ -0,0 +1,19 @@
+(function() {
+'use strict';
+
+const chance = TestData.WTWriteConflictExceptionChance;
+assert.gte(chance, 0, "WTWriteConflictExceptionChance must be >= 0");
+assert.lte(chance, 1, "WTWriteConflictExceptionChance must be <= 1");
+
+const readChance = TestData.WTWriteConflictExceptionForReadsChance;
+assert.gte(readChance, 0, "WTWriteConflictExceptionForReadsChance must be >= 0");
+assert.lte(readChance, 1, "WTWriteConflictExceptionForReadsChance must be <= 1");
+
+assert.commandWorked(db.adminCommand(
+    {configureFailPoint: 'WTWriteConflictException', mode: {activationProbability: chance}}));
+
+assert.commandWorked(db.adminCommand({
+    configureFailPoint: 'WTWriteConflictExceptionForReads',
+    mode: {activationProbability: readChance}
+}));
+})();